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Transgranular Cracking in a Liquid Zn Embrittled High Strength Steel

16 Pages Posted: 14 Aug 2019 Publication Status: Accepted

See all articles by Diptak Bhattacharya

Diptak Bhattacharya

Colorado School of Mines - Department of Metallurgical and Materials Engineering

Lawrence Cho

Government of the United States of America - National Institute of Standards and Technology (NIST)

Ellen Van der Aa

Tata Steel

Hassan Ghassemi-Armaki

ArcelorMittal Research

Andreas Pichler

Vienna University of Economics and Business; voestalpine Stahl Linz GmbH

Kip O. Findley

Colorado School of Mines - Department of Metallurgical and Materials Engineering

John G. Speer

Colorado School of Mines - Department of Metallurgical and Materials Engineering

Abstract

Intergranular Zn-assisted liquid metal embrittlement (LME) cracks have been frequently reported in steels, involving austenite grain boundary penetration of liquid Zn at high temperature. In the present study, a Zn-coated high strength steel was deformed at an intercritical temperature, and the characteristics of LME cracking were studied in a mixed microstructure composed of ferrite and austenite. Crack propagation was intergranular in austenite; in contrast, the ferrite exhibited both intergranular LME and "transgranular" LME. Trace analysis of the crack plane orientation was consistent with cracking along {100} cleavage planes.

Keywords: liquid metal embrittlement, high strength steel, Zn, ferrite, transgranular cracking

Suggested Citation

Bhattacharya, Diptak and Cho, Lawrence and Aa, Ellen Van der and Ghassemi-Armaki, Hassan and Pichler, Andreas and Findley, Kip O. and Speer, John G., Transgranular Cracking in a Liquid Zn Embrittled High Strength Steel. Available at SSRN: https://ssrn.com/abstract=3435679 or http://dx.doi.org/10.2139/ssrn.3435679

Diptak Bhattacharya (Contact Author)

Colorado School of Mines - Department of Metallurgical and Materials Engineering ( email )

United States

Lawrence Cho

Government of the United States of America - National Institute of Standards and Technology (NIST)

Gaithersburg, MD 20899-8910
United States

Ellen Van der Aa

Tata Steel

Jamshedpur
India

Hassan Ghassemi-Armaki

ArcelorMittal Research

Voie Romaine-BP30320
57283 Maizieres-les-Metz Cedex
France

Andreas Pichler

Vienna University of Economics and Business ( email )

Welthandelsplatz 1
Vienna, Wien 1020
Austria

voestalpine Stahl Linz GmbH ( email )

Austria

Kip O. Findley

Colorado School of Mines - Department of Metallurgical and Materials Engineering

United States

John G. Speer

Colorado School of Mines - Department of Metallurgical and Materials Engineering

United States

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